Respiratory System - Carnegie Stage 22: Difference between revisions
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== Introduction == | |||
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| width=300px|<html5media height="280" width="290">File:Stage22_GIT3d.mp4</html5media> | |||
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===Respiratory System=== | |||
Based upon a serial reconstruction from individual embryo slice images (27 mm Human embryo, Carnegie Stage 22 approximate day 56). | |||
Note the relative size and position of individual structures and organs at this early stage of development. The respiratory system is endodermal in origin, initially "budding off" the foregut during week 3. This bud forms the respiratory diverticulum, at the level of the glottis between the adult oesophagus and trachea. It continues to bud in week 4, forming a pair of lung buds. | |||
{{Gastrointestinal stage 22 movie}} | |||
:'''Links:''' [[Media:Stage22_GIT3d.mp4|MP4 version]] | [[Media:Stage22_GIT.mov|Quicktime version]] | [[Carnegie stage 22]] | [[Gastrointestinal Tract Development]] | |||
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{{Respiratory Links}} | |||
{| | |||
| | {| | ||
! Virtual Slides | |||
| | |- | ||
| valign=bottom|{{SlideStage22-15}} | |||
| valign=bottom|{{SlideStage22-17}} | |||
| valign=bottom|{{SlideStage22-25}} | |||
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:'''Stage 22 Histology Links:''' [http://embryology.med.unsw.edu.au/embryology/Slides/Embryo_Stages/Stage22/25/Stage22-25.html?zoom=4&lat=-5906&lon=5560&layers=B Both lungs overview] | [http://embryology.med.unsw.edu.au/embryology/Slides/Embryo_Stages/Stage22/25/Stage22-25.html?zoom=5&lat=-6294&lon=6878&layers=B Lung and pleural cavity] | [http://embryology.med.unsw.edu.au/embryology/Slides/Embryo_Stages/Stage22/25/Stage22-25.html?zoom=6&lat=-6115&lon=5023&layers=B Right and Left Main Bronchi] | [http://embryology.med.unsw.edu.au/embryology/Slides/Embryo_Stages/Stage22/25/Stage22-25.html?zoom=6&lat=-6368&lon=6654&layers=B Lung Bronchi] | |||
{| class="wikitable" border="1" | {| class="wikitable" border="1" | ||
|+ '''[[Carnegie stage | |+ '''[[Carnegie stage 22 - serial sections|Stage 22]] (serial labeled images)''' | ||
! Section | ! Section | ||
! Name | ! Name | ||
! Description | ! Description | ||
|- | |||
| [[File:Stage_22 image 054.jpg|200px]] | |||
| [[:File:Stage_22 image 054.jpg|A5L]] | |||
| Bridge of nose. | |||
R and L olfactory bulbs from forebrain. | |||
|- | |||
| [[File:Stage_22 image 055.jpg|200px]] | |||
| [[:File:Stage_22 image 055.jpg|A6L]] | |||
| Nose. Nasal septum. Nasal capsule. | |||
Olfactory epithelium lining roof of nasal cavity. | |||
Orbital part of the developing sphenoid bone (intramembranous ossification). | |||
|- | |||
| [[File:Stage_22 image 056.jpg|200px]] | |||
| [[:File:Stage_22 image 056.jpg|A7L]] | |||
| Conchae. Nasal capsule and septum. | |||
|- | |||
|- | |||
| [[File:Stage_22 image 057.jpg|200px]] | |||
| [[:File:Stage_22 image 057.jpg|B1L]] | |||
| Conchae. Optic nerve. | |||
|- | |||
| [[File:Stage_22 image 058.jpg|200px]] | |||
| [[:File:Stage_22 image 058.jpg|B2L]] | |||
| Description | |||
|- | |||
| [[File:Stage_22 image 059.jpg|200px]] | |||
| [[:File:Stage_22 image 059.jpg|B3L]] | |||
| Perpendicular plate of ethmoid cartilage. Adenohypophysis. Neurohypophysis. Ant. and post. walls of hypopophysial fossa. Lesser wings of sphenoid cartilage. Internal carotid arteries. | |||
|- | |||
| [[File:Stage_22 image 060.jpg|200px]] | |||
| [[:File:Stage_22 image 060.jpg|B4L]] | |||
| Dorsum of tongue. Oropharynx communicating with naso-pharynx (cf. [[:File:Stage_22 image 059.jpg|B3L]] - palatal processes not fused). | |||
|- | |||
| [[File:Stage_22 image 061.jpg|200px]] | |||
| [[:File:Stage_22 image 061.jpg|B5L]] | |||
| Tongue with palatal processes at either side. Transverse (intrinsic) muscle of tongue. | |||
Pharyngotympanic tubes. | |||
|- | |||
| [[File:Stage_22 image 062.jpg|200px]] | |||
| [[:File:Stage_22 image 062.jpg|B6L]] | |||
| Tongue with transverse muscle, genioglossus muscle (medial) and hyoglossus muscle (lateral). | |||
Palatal processes. | |||
Meckel's cartilage. Note teeth enamel organs (dark masses at sides of tongue attachment). | |||
|- | |||
| [[File:Stage_22 image 063.jpg|200px]] | |||
| [[:File:Stage_22 image 063.jpg|B7L]] | |||
| Transverse caudal pharynx. epiglottis. Hyoid musculature. Pharyngeal constrictor muscle. Submandibular gland. | |||
|- | |||
|- | |||
| [[File:Stage_22 image 064.jpg|200px]] | |||
| [[:File:Stage_22 image 064.jpg|C1L]] | |||
| Pharynx. Pharyngeal constrictor muscle. laryngeal caecum (ventral). Arytenoid swellings in contact. | |||
Thyroid cartilage laminae (anterolateral), with superior horns (posterolateral). Hyoid cartilage. Internal jugular veins. | |||
"Muz's cheshire cat" | |||
|- | |||
| [[File:Stage_22 image 065.jpg|200px]] | |||
| [[:File:Stage_22 image 065.jpg|C2L]] | |||
| Pharynx. Thyroid cartilage. Smaller laryngeal caecum (cf.C1). Carotid neurovascular bundle. | |||
|- | |- | ||
| [[File:Stage_22 image 066.jpg|200px]] | | [[File:Stage_22 image 066.jpg|200px]] | ||
| [[:File:Stage_22 image 066.jpg|C3L]] | | [[:File:Stage_22 image 066.jpg|C3L]] | ||
| | | Pharynx with its inferior constrictor muscle. Glottis region. | ||
|- | |- | ||
| [[File:Stage_22 image 067.jpg|200px]] | | [[File:Stage_22 image 067.jpg|200px]] | ||
| [[:File:Stage_22 image 067.jpg|C4L]] | | [[:File:Stage_22 image 067.jpg|C4L]] | ||
| | | Oesophagus with muscle layer and trachea with thyroid gland laterally. | ||
Common carotid arteries. Vagus nerve. Internal jugular veins. | |||
(Section damaged) | |||
|- | |- | ||
| [[File:Stage_22 image 068.jpg|200px]] | | [[File:Stage_22 image 068.jpg|200px]] | ||
| [[:File:Stage_22 image 068.jpg|C5L]] | | [[:File:Stage_22 image 068.jpg|C5L]] | ||
| | | Oesophagus, smaller than in C4. Trachea. | ||
Thyroid gland (isthmus). Clavicle. Small dark masses near posterolateral borders of thyroid gland are the parathyroid glands from the caudal part of 3rd pharyngeal pouch. | |||
|- | |- | ||
| [[File:Stage_22 image 069.jpg|200px]] | | [[File:Stage_22 image 069.jpg|200px]] | ||
| [[:File:Stage_22 image 069.jpg|C6L]] | | [[:File:Stage_22 image 069.jpg|C6L]] | ||
| | | Trachea. | ||
Clavicles. Dark connecting stalk between parathyroid gland and thymus (rostral end of 3rd pharyngeal pouch). | |||
Common carotid artery. | |||
|- | |- | ||
| [[File:Stage_22 image 070.jpg|200px]] | | [[File:Stage_22 image 070.jpg|200px]] | ||
| [[:File:Stage_22 image 070.jpg|C7L]] | | [[:File:Stage_22 image 070.jpg|C7L]] | ||
| | | Trachea. | ||
Oesphagus. Apex of R lung in pleural cavity | |||
Sternum. Thymus gland. L brachiocephalic vein. Brachiocephalic trunk. | |||
|- | |- | ||
Line 43: | Line 157: | ||
| [[File:Stage_22 image 071.jpg|200px]] | | [[File:Stage_22 image 071.jpg|200px]] | ||
| [[:File:Stage_22 image 071.jpg|D1L]] | | [[:File:Stage_22 image 071.jpg|D1L]] | ||
| | | Lungs. Visceral and parietal pleurae. Pleural cavities. | ||
Sternum. Thymus. | |||
Other contents of superior mediastinum. | |||
|- | |- | ||
| [[File:Stage_22 image 072.jpg|200px]] | | [[File:Stage_22 image 072.jpg|200px]] | ||
| [[:File:Stage_22 image 072.jpg|D2L]] | | [[:File:Stage_22 image 072.jpg|D2L]] | ||
| | | Lungs. | ||
|- | |- | ||
| [[File:Stage_22 image 073.jpg|200px]] | | [[File:Stage_22 image 073.jpg|200px]] | ||
| [[:File:Stage_22 image 073.jpg|D3L]] | | [[:File:Stage_22 image 073.jpg|D3L]] | ||
| | | Tracheal bifurcation. | ||
|- | |- | ||
| [[File:Stage_22 image 074.jpg|200px]] | | [[File:Stage_22 image 074.jpg|200px]] | ||
| [[:File:Stage_22 image 074.jpg|D4L]] | | [[:File:Stage_22 image 074.jpg|D4L]] | ||
| | | Right primary bronchus (torn) and right superior lobe bronchus. | ||
Left primary bronchus. | |||
Left and right pulmonary arteries. | |||
Ribs joining to sternum. | |||
|- | |- | ||
| [[File:Stage_22 image 075.jpg|200px]] | | [[File:Stage_22 image 075.jpg|200px]] | ||
| [[:File:Stage_22 image 075.jpg|D5L]] | | [[:File:Stage_22 image 075.jpg|D5L]] | ||
| | | R, L primary bronchi. R anterior and posterior segmental bronchi coming off R superior lobe bronchus. L, R pulmonary arteries. Hilar attachments of lungs to mediastinal tissues - note extent of R, L pleural cavities. | ||
|- | |- | ||
| [[File:Stage_22 image 076.jpg|200px]] | | [[File:Stage_22 image 076.jpg|200px]] | ||
| [[:File:Stage_22 image 076.jpg|D6L]] | | [[:File:Stage_22 image 076.jpg|D6L]] | ||
| | | R, L primary bronchi (note left still has not branched). R pulmonary artery. | ||
|- | |- | ||
| [[File:Stage_22 image 077.jpg|200px]] | | [[File:Stage_22 image 077.jpg|200px]] | ||
| [[:File:Stage_22 image 077.jpg|D7L]] | | [[:File:Stage_22 image 077.jpg|D7L]] | ||
| | | R, L primary bronchi: note distinct horizontal course of L, vertical course of R, L pulmonary veins (L empty). R pulmonary artery. | ||
|- | |- | ||
Line 79: | Line 204: | ||
| [[File:Stage_22 image 078.jpg|200px]] | | [[File:Stage_22 image 078.jpg|200px]] | ||
| [[:File:Stage_22 image 078.jpg|E1L]] | | [[:File:Stage_22 image 078.jpg|E1L]] | ||
| | | Pulmonary veins. Azygos, hemiazygos veins. Ribs. Intercostal muscles. | ||
|- | |- | ||
| [[File:Stage_22 image 079.jpg|200px]] | | [[File:Stage_22 image 079.jpg|200px]] | ||
| [[:File:Stage_22 image 079.jpg|E2L]] | | [[:File:Stage_22 image 079.jpg|E2L]] | ||
| | | Pulmonary veins. Azygos, hemiazygos veins. Ribs. Intercostal muscles. | ||
|- | |- | ||
| [[File:Stage_22 image 080.jpg|200px]] | | [[File:Stage_22 image 080.jpg|200px]] | ||
| [[:File:Stage_22 image 080.jpg|E3L]] | | [[:File:Stage_22 image 080.jpg|E3L]] | ||
| | | R dome of diaphragm. R long middle and inferior lobes. L long superior and inferior lobes. Xiphoid process. | ||
Liver. | |||
|- | |- | ||
| [[File:Stage_22 image 081.jpg|200px]] | | [[File:Stage_22 image 081.jpg|200px]] | ||
| [[:File:Stage_22 image 081.jpg|E4L]] | | [[:File:Stage_22 image 081.jpg|E4L]] | ||
| | | Diaphragm (note costal attachment). R lung inferior lobe. | ||
Inferior vena cava, dorsal to diaphragm. | |||
|- | |- | ||
| [[File:Stage_22 image 082.jpg|200px]] | | [[File:Stage_22 image 082.jpg|200px]] | ||
| [[:File:Stage_22 image 082.jpg|E5L]] | | [[:File:Stage_22 image 082.jpg|E5L]] | ||
| | | Inferior lobes of lungs. | ||
Diaphragm with sternal attachments. | |||
Inferior vena cava, now ventral to diaphragm (vena caval foramen). | |||
Liver. | |||
|- | |||
| [[File:Stage_22 image 083.jpg|200px]] | |||
| [[:File:Stage_22 image 083.jpg|E6L]] | |||
| Liver. Thoracic aorta. Large adrenal glands. | |||
|- | |||
| [[File:Stage_22 image 084.jpg|200px]] | |||
| [[:File:Stage_22 image 084.jpg|E7L]] | |||
| Lumbar diaphragm. Thoracic aorta. Note ribs 11 and 12 on L and three layers of abdominal muscles extending ventrally. | |||
|- | |||
|- | |||
| [[File:Stage_22 image 085.jpg|200px]] | |||
| [[:File:Stage_22 image 085.jpg|F1L]] | |||
| Lumbar diaphragm. Thoracic aorta. | |||
|- | |||
| [[File:Stage_22 image 086.jpg|200px]] | |||
| [[:File:Stage_22 image 086.jpg|F2L]] | |||
| Attachment of lumbar diaphragm near L 1 on R with psoas muscle dorsal to it. Note abdominal aorta giving rise to superior mesenteric artery. | |||
|- | |- | ||
|} | |} | ||
==All Sections== | |||
{{Template:Stage22Licon120}} | |||
{{Template:Glossary}} | {{Template:Glossary}} | ||
{{Template:Footer}} | {{Template:Footer}} | ||
[[Category:Carnegie Stage 22 | [[Category:Carnegie Stage 22]] |
Latest revision as of 13:44, 10 September 2014
Introduction
<html5media height="280" width="290">File:Stage22_GIT3d.mp4</html5media> |
Respiratory SystemBased upon a serial reconstruction from individual embryo slice images (27 mm Human embryo, Carnegie Stage 22 approximate day 56). Note the relative size and position of individual structures and organs at this early stage of development. The respiratory system is endodermal in origin, initially "budding off" the foregut during week 3. This bud forms the respiratory diverticulum, at the level of the glottis between the adult oesophagus and trachea. It continues to bud in week 4, forming a pair of lung buds.
|
Virtual Slides | |||||||||||
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|
|
|
- Stage 22 Histology Links: Both lungs overview | Lung and pleural cavity | Right and Left Main Bronchi | Lung Bronchi
Section | Name | Description |
---|---|---|
A5L | Bridge of nose.
R and L olfactory bulbs from forebrain. | |
A6L | Nose. Nasal septum. Nasal capsule.
Olfactory epithelium lining roof of nasal cavity. Orbital part of the developing sphenoid bone (intramembranous ossification). | |
A7L | Conchae. Nasal capsule and septum. | |
B1L | Conchae. Optic nerve. | |
B2L | Description | |
B3L | Perpendicular plate of ethmoid cartilage. Adenohypophysis. Neurohypophysis. Ant. and post. walls of hypopophysial fossa. Lesser wings of sphenoid cartilage. Internal carotid arteries. | |
B4L | Dorsum of tongue. Oropharynx communicating with naso-pharynx (cf. B3L - palatal processes not fused). | |
B5L | Tongue with palatal processes at either side. Transverse (intrinsic) muscle of tongue.
Pharyngotympanic tubes. | |
B6L | Tongue with transverse muscle, genioglossus muscle (medial) and hyoglossus muscle (lateral).
Palatal processes. Meckel's cartilage. Note teeth enamel organs (dark masses at sides of tongue attachment). | |
B7L | Transverse caudal pharynx. epiglottis. Hyoid musculature. Pharyngeal constrictor muscle. Submandibular gland. | |
C1L | Pharynx. Pharyngeal constrictor muscle. laryngeal caecum (ventral). Arytenoid swellings in contact.
Thyroid cartilage laminae (anterolateral), with superior horns (posterolateral). Hyoid cartilage. Internal jugular veins. "Muz's cheshire cat" | |
C2L | Pharynx. Thyroid cartilage. Smaller laryngeal caecum (cf.C1). Carotid neurovascular bundle. | |
C3L | Pharynx with its inferior constrictor muscle. Glottis region. | |
C4L | Oesophagus with muscle layer and trachea with thyroid gland laterally.
Common carotid arteries. Vagus nerve. Internal jugular veins. (Section damaged) | |
C5L | Oesophagus, smaller than in C4. Trachea.
Thyroid gland (isthmus). Clavicle. Small dark masses near posterolateral borders of thyroid gland are the parathyroid glands from the caudal part of 3rd pharyngeal pouch. | |
C6L | Trachea.
Clavicles. Dark connecting stalk between parathyroid gland and thymus (rostral end of 3rd pharyngeal pouch). Common carotid artery. | |
C7L | Trachea.
Oesphagus. Apex of R lung in pleural cavity Sternum. Thymus gland. L brachiocephalic vein. Brachiocephalic trunk. | |
D1L | Lungs. Visceral and parietal pleurae. Pleural cavities.
Sternum. Thymus. Other contents of superior mediastinum. | |
D2L | Lungs. | |
D3L | Tracheal bifurcation. | |
D4L | Right primary bronchus (torn) and right superior lobe bronchus.
Left primary bronchus. Left and right pulmonary arteries. Ribs joining to sternum. | |
D5L | R, L primary bronchi. R anterior and posterior segmental bronchi coming off R superior lobe bronchus. L, R pulmonary arteries. Hilar attachments of lungs to mediastinal tissues - note extent of R, L pleural cavities. | |
D6L | R, L primary bronchi (note left still has not branched). R pulmonary artery. | |
D7L | R, L primary bronchi: note distinct horizontal course of L, vertical course of R, L pulmonary veins (L empty). R pulmonary artery. | |
E1L | Pulmonary veins. Azygos, hemiazygos veins. Ribs. Intercostal muscles. | |
E2L | Pulmonary veins. Azygos, hemiazygos veins. Ribs. Intercostal muscles. | |
E3L | R dome of diaphragm. R long middle and inferior lobes. L long superior and inferior lobes. Xiphoid process.
Liver. | |
E4L | Diaphragm (note costal attachment). R lung inferior lobe.
Inferior vena cava, dorsal to diaphragm. | |
E5L | Inferior lobes of lungs.
Diaphragm with sternal attachments. Inferior vena cava, now ventral to diaphragm (vena caval foramen). Liver. | |
E6L | Liver. Thoracic aorta. Large adrenal glands. | |
E7L | Lumbar diaphragm. Thoracic aorta. Note ribs 11 and 12 on L and three layers of abdominal muscles extending ventrally. | |
F1L | Lumbar diaphragm. Thoracic aorta. | |
F2L | Attachment of lumbar diaphragm near L 1 on R with psoas muscle dorsal to it. Note abdominal aorta giving rise to superior mesenteric artery. |
All Sections
A1L | A2L | A3L | A4L | A5L | A6L | A7L |
B1L | B2L | B3L | B4L | B5L | B6L | B7L |
C1L | C2L | C3L | C4L | C5L | C6L | C7L |
D1L | D2L | D3L | D4L | D5L | D6L | D7L |
E1L | E2L | E3L | E4L | E5L | E6L | E7L |
F1L | F2L | F3L | F4L | F5L | F6L | F7L |
G1L | G2L | G3L | G4L | G5L | G6L | G7L |
Glossary Links
- Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link
Cite this page: Hill, M.A. (2024, June 27) Embryology Respiratory System - Carnegie Stage 22. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Respiratory_System_-_Carnegie_Stage_22
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G